CD-Roms (All of these CD-Roms don't need to be installed to run.)
A.D.A.M. Interactive Physiology (Muscular) - (#8, 9) Excellent animations and narration about the anatomy, contraction, neuromuscular junction, and metabolism of muscles.
A.D.A.M. Comprehensive or Essentials - Anatomy of the human body.
Interactive Atlas of Human Anatomy - (#40) Excellent illustrations of human anatomy with labels.
Muscular System links page